Pedestal car-truck.



J. M. HANSEN.

PEDESTAL APPLICATION FILED 00111 1910 CAR TRUCK,

2 SHEET$SHEET 1.

m o w INVE WETN ESSEQ J. M. HANSEN. PEDESTAL CAR TRUCK.

APPLICATION FILED OCT. 17, 1910.

Patented A r; 7, 1914,

2 SHEETS-SHEET 2.

INVENTOHQ WITNESSEfio a F. WM

NrrnD srATEs PATENT OFFICE.

JOHN M. HANSEN, OF PITTfiBURGH, PENNSYLVANIA.

PEDESTAL GAR-TRUCK.

Specification of Letters Patent.

Patented Apr. '7, 1914.

Application filed October 17, 1910. Serial No. 587,437.

proved construction of truck which will to sudden not be subject tobreakage due.

' the trackstrains caused by unevenness in way. i

A further object is to provide an improved cast metal side frameconstructed along mechanically correct linesto obtain the greatestresistance to working stresses, and thus providing a unitarypedestalside frame having all the advantages of the ordinary diamond side frametruck made up of several bars and separate pieces.

It is well known in railway practice that the two opposite rails of thetrack seldom have their to surfaces in the same plane for any consierable distance; and that on account of defects in the road bed, thewheels on one side of a truck are often suddenly. depressed or raised,thus causing jolting and terrific side strains in the truck body. Likestrains are caused by lateral inequalities or imperfections in thetrack, such as in passing around curves, and the lateral and twistingstrains continually wrench and often cause the breaking of the rigidpedestal truck bodies where the two side frames are rigidly connected.

By my invention I am enabled to over come this difficulty, and to thatend I provide a truck having. side frames of the pedestal type in whichspring seats and springs are provided above the journal boxes embracedby pedestal guides or jaws; and the side frames are directly connectedby the truck bolster bv means of flexible connections, so providing forflexion in the truck frame itself while properly spacing the sideframes, and permitting the truck to better conform to the irregularitiesand inequalities of the track. I also dispense with the rigid end tiebars and other connections between the side frames and so reduce thecost thereof.- My preferred construction also comprises a pedestal sideframe of integral cast metal provided with recesses and bracescorresponding to the arch bars and tie'bar of the diamond side frametype.

In the drawings Figure 1 is a plan view partly in horizontal sect-ion ofa railroad car truck illustrating my invention. Fig. 2 is a sideelevation of the truck illustrated in Fig. 1. Fig. 3 is a transversevertical section onthe line 3-43 Fig. 2. Fig. 4 is a detail fragmentaryhorizontal sectional view illustrating the flexible connection betweenthe connecting bolster and the side frame and Fig. 5 is a detailvertical longitudinal section illustrating the integral cast metaljournal box guides or jaws.

The side frames 1 of the truck may be of any known form of pedestaltruck to obtain the necessary strength. The side frames 1 illustratedare constructed of cast metal such as steel or iron and embody certaindetail improvements. Each side frame has the journal box guides or jaws3, 4 containing the journal .box seats 2. Each journal box seat 2 has anupward extension 2' forming the spring seat in. which the springs'5 ofordinary construction are carried above the journal boxes 6. The uppermember 7 of the truck frame 1 is a portion of the entire castingextending longitudinally over the spring seats 2 and downwardly to formthe outer box-guides 3. It has the shape of a rolled section, such asthe L-bar illustrated in the drawings, and forms in effect the upperarch bar of the truck. The bracin members 9 extend diagonally across thedivided recesses 10 in the side frame, joinin the upper member 7' nearits juncture wit the interior box-guides 4, and joining the lower member11 near its juncture with the bolster guides 12. The lower member 11 andbolster guide members 12 are integral with the upper member 7 anddiagonal bracmg members 9, but the bracing members 9 correspondmechanically to the lowerv arch bars of the diamond side frame truck andthe lower member 11 forms the two pedestal tie bars.

The lower member 11 extends longitudinally to the inner box guides 4which are provided with the bolt holes 13 in alinement with thecorresponding bolt holes .14 in the The members of the side frame properabove separately described form one integral cast metal structure whichhas all the ad; vantages of lightness obtained by the rolled sectionsandtie bars of other non-integral trucks. It is truly a pedestal type oftruck, however, as the springs are carried above the journal boxes andthe connecting bolster in the seat 16. between the bolster guides12-sarily the center bearing 18 on which the I car bolster is swiveled andsupported. The brake beams 19 and brake beam hangers 20 also form nopart of my invention and like the journal boxes 6, these may be of anysuitable construction. The truck bolster 17, however, is directly andflexibly seated in slots or seats 21 in the side frames between thebolster guides 12 thereof. The cross bar 22 connects the pedestal guides12'and supports the end 23 of the truck bolster at the proper height inthe frame forming the lower wall of the slot 21 and having below it arecess 24: for the sake of lightness of construction.

Each end 23 of the truck bolster 17 is flexibly connected to the sideframe 1. I prefer to connect the bolster to the side frame asillustrated by providing a reduced end 23 on the bolster of less depththan the depth of the slot 21 and provided with the transverse lowerflanges or lips 25, 26, which are adapted to register with and embracethe cross bar 22 when the bolster is adjusted in position. Any otherflexible or yielding connection between the truck bolster and the sideframe however, is within the spirit of my invention which comprisesbroadly a truck frame adapted to be hung and cushioned upon the caraxles, and having its 0 posite side frames directly joined by a yieldingor flexible connection. To provide for centering the bolsterlongitudinally of the side frames, and permitting easy fiexion betweenthe bolster and frames, I provide the projecting shoulders 28 at thebase of the seats 21, and extending up only a short dis-- tance on thesides of the end portions 23 of the bolster, leaving the bolster free toswing or rock in said side frames.

The car axles 25 connecting the wheels 27 suffice to hold the wheels inupright position rigidly, the journal boxes mounted on the axles and inthe side frames space the side frames apart and sustain them in roperupright position, and the weight of t e car upon the truck bolster 17holds it normally in the seats 21 of the side frame. When either of thewheels 27 is raised suddenly by a jolt of traiiic the effect is merelyto raise one of the side frames without alsotransmitting a heavy stressto the opposite side .franae. The truck frame can also conform tolateral or twisting strains, by the swinging of the frames onthe ends ofthe bolster, so permitting the wheels to more easily follow the track,relieving friction between the Wheels and rails, and overcomingliability of breakage from strains of either character. The effect ismerely to pivot the connecting bolster 17 at each end slightly about thesupporting cross bar 22, the truck returning to normal alinement as soonas the shocks or strains have been absorbed in the springs or otherwise.I

What I claim is:

1. A car truck having side frames, wheel axles joining and supportingthe same, each of said frames being provided with a seat,

and having a flexible connectlon therewith comprising downwardlyextending lips embracing said seat, said connection permitting verticalrocking movement of said spacing member relatively'tosaid side frames,substantially as described.

2. 'A car truck comprising side frames of the pedestal type, eachrovided with a recess and bolster support elow the same, and a truckbolster spacing said side frames having its end portions in each recessof less depth than said recess, resting on said support, and providedwit-h depending lips embracing the same.

3. A car truck comprising side frames of the pedestal type, eachprovided with a recess and bolster support below the same, and a truckbolster spacing said side frames having itsend portions in each recessof less depth than the same, resting on said support and provided withdepending lips embracing the same, said support having upwardlyextending shoulders near the base of said recess adapted to center saidbolster therewithin.

4. In a pedestal car truck, the combination with side frames eachprovided with a recess between the journal box guides, and having asupporting cross bar forming the base of the recess, of a truck bolsterhaving its end portions of less depth than the depth of said recesses,and provided with flanges adapted to register with said cross bar.

5. In a pedestal car truck, the combination with side frames eachprovided with bolster guides, and a support for the bolster connectingthe same thereby forming a recess to receive the bolster, of a bolsterflexibly mounted in the frames having its end portions of smaller sizethan said recesses so as to freely enter the same, said bolster guideshaving lugs at the base thereof extending partway up the sides of thebolster, said bolster forming the only connection be tween said sideframes, substantially as described.

A car truck comprising side frames said seats and supporting the framesupon said wheel axles and a single truck bolster spacing said sideframes and having a rocka ing bearing on each side frame permitting thevertical rocking of said bolster relative to said frames in a plane atright angles to the planes of said side frames- 7. A car truckcomprising side frames, wheel axles joining and su porting the same,each of said frames being provided with a substantially flat bearingsurface or seat extending transversely thereof, and a.

spacing member joining said frames and having flexible connectlonstherewith comprising a substantially flat bearin face extendinglongitudinally of the'en s respectively of each spacing member, havingshoulders at either end adapted to embrace the sides of the adjacentside frames whereby the spacing member may rock vertically with respectto said side frames and said flat bearing faces will tend to restore andhold the side frames at right angles to the horizontal plane of saidspacing member.

In testimony whereof, I the said J OHN M.

HANSEN have hereunto set my hand.

- j JOHN M. HANSEN.

Witnesses; v

ROBERT C. To'rrEN, JOHN F. W111.

